Sunday, January 31, 2016

EMG-6 "Shop Notes" January 2016

January "Shop Notes"

"EMG-6 Shop Notes" is a day-to-day accounting of what's going on in the shop with the EMG-6 Electric Motor Glider.Hello

January 29, 2016 Upgrade to the EMG-6 Blog

We have just recently added the capability to be able to automatically convert email responses into blog posts. This will greatly enhance the transmission of information as we regularly get the exact same questions asked over and over again.  In addition we have added a tab called Q&A at the top of the blog for easy access to all of the future posts related to questions asked by the general public and customers.
Link to Q&A Page

January 27, 2016 Aircraft Spruce Now Stocking the EMG-6 Streamlined Struts

Aircraft spruce is now stocking the streamlined struts used On the EMG-6. Although aircraft spruce will be our only outside supplier for the streamlined strut material, You can still purchase the streamlined strut directly from us if you are an aircraft builder and have a serial number.  And of course EMG-6 builders will receive a substantial discount Over the Aircraft Spruce price.

January 25, 2016 Parts Manufacturing Continues

We're just finished with a redesign of the rear spar attach fitting.

These parts are replacements for the Quicksilver parts that are no longer available.

We've taken the time to much improved the design and simplify  the attachment process.

Because this aircraft incorporates a wing fold system the fittings on both the forward and rear spar have to be strong enough to withstand the constant removal and re-installation.

The rear spar attachment adapter tube is almost identical to the original to  with some slight modifications.
It now requires much less machining as we have redesigned the attachment fitting on the fuselage to allow all of the holes in the attachment tube to be drilled perpendicular to the tube center axes.

Friday, January 29, 2016

Re: information (ITALY)

On Thu, Jan 28, 2016 at 11:04 PM,  Francesco  wrote:

Good Morning, what is the cost of a basic kit of your ep motoglider?

is it possible to buy from Italy and have it shipped?

thank you in advance
best regards


Thank you for your inquiry about our EMG-6. Let me summarize the current status of our production and kit availability.

Currently there are only 11 aircraft that are flying or in production. The first prototype which you've likely seen many videos and information about which has flown with an electric power plant and is now currently flying with a two-stroke Polini 250 motor, the second prototype which is the higher performance (LD) version of the aircraft which is nearing completion. And the third prototype which is currently being used in the development of the builder video series and the development of building manuals and instructions.

Re: EMG-6 and Polini Engine

Good Morning Mr. Carpenter:

Wow!  Very excited about the EMG-6.  Your attention to detail has impressed me in a big way!  Two quick questions if I may.  What caused the electric engine failure in the video??  I too am more than a little concerned about RC electric motor durability.  Yuneec Corp. seems to have a handle on their motors, have you considered them?  I am waiting to see the final configuration for the Zigalo and Aeromarine as well.  I have to admit though that your airframe looks rock solid relative to the Zigalo.

 I have never trusted two-stroke engines.  So much so that it has prevented me from building and flying ultralights for the last 20 years!  I have great faith in electric  
 motor technology, but it is still evolving.  I have heard a lot of good things about the Polini Thor 250, and you seem to like it as well.  Do you think this engine is a viable
 option?  So many companies have attempted to produce a reliable/durable two-stroke and it just has not happened!  

  I hope you find the time to reply.  I look forward to hearing from you.

David E. 


The reason for the electric motor failure in the video that I'm assuming you're referring to is related to an over-temperature of the ESC (electric speed controller) in the next video we talk about how we solved that problem, by adding a CPU cooling fan from Best Buy's directly to the ESC controller. That solved the problem and we never did have any additional ESC problems after that point.

I don't know if you've been following our blog  or not but we talked a lot about this during that time..

Sunday, January 3, 2016

"The Art of the Wire" Sport Aviation / Experimenter "Technically Speaking" Article December 2015

"Safety Wire" 

Sport Aviation / Experimenter magazine "Technically Speaking" December 2015 Article

Our monthly column in Sport Aviation/Experimenter  Magazine for the month of December was an article on Safety Wire

We discuss the nuances of safety wiring.

If you're not a member of EAA "you should be".

The magazine alone is well worth the annual membership fee.

Link to EAA 

 The Art of the Wire

Although the practice of safety wire itself is not particularly difficult, the chasm between casual practice and precision execution could easily fit a Boeing 747. Even the participants in our repairman workshops with aviation backgrounds often require many hours practice to master the basic do’s and don’ts of safety wire. And practice, practice, practice is the only solution for developing efficiency and that “attention to detail” type of craftsmanship which is essential in an award-winning aircraft. Even if you’re not looking to win the “Lindy” award, details like safety wire tell us a lot about the mindset of the aircraft builder or mechanic. Anecdotally, over the years, we have seen a very strong, positive correlation between safety, aircraft reliability and the builders who put the effort into the details.

More often than not, we see safety wire installations that in practice will probably work, but strictly speaking are done with poor execution. In researching for this article, we found more cases of improper safety wire procedures, than we found examples of safety wire done correctly. By definition, safetying is “Securing by various means any nut, bolt, turnbuckle etc., on the aircraft so that vibration will not cause it to loosen during operation.” This runs contrary to the mindset that the safety wire is used to hold the part from falling off of the aircraft after having come loose. Only proper technique can ensure that the fastener will not come loose during normal operation.

Vacation "Ship Building Contest"


The ongoing joke around the shop is my abnormal aversion to going on vacation. Everyone who knows me, knows that I would much rather spend my time in the shop building and creating. I also have a tendency to work seven days a week throughout the entire year. And most days are 12 to 14 hours long. This is you might imagine can be rather difficult on a marriage.

As a compromise for putting up with my abnormal lifestyle Carol gets a vacation of her choice anywhere in the world for 2 to 3 weeks once every 12 to 14 months. And the best part for her, is that I pretend as convincingly as possible that I'm having a great time every year. This year's vacation was a cruise from Buenos Aires Argentina around Cape Horn to Santiago Chile. This is the first year that we have done a cruise where there has been days at sea. Normally Carol likes to be in a different port every day. This is probably to keep my ADD at bay by having something for me to do. This year however the cruise involved three days at sea and Carol was unsure whether I would go stir crazy.
Five days before the end of the cruise Carol read in the morning ships newsletter that they would be having an  on-board ship building contest. "Eureka" something for Brian to do. After breakfast we attended the meeting where the cruise director laid out the ground rules. The basics were to build a ship that would carry 6 cans of soda. And on the last day of the cruise the competition would be held in the swimming pool on board the ship.
The judging would be conducted by several crew members including the captain of the ship. The judging would be done based on visual appeal, seaworthiness, and storyline associated with the purpose of your ship and its itinerary. During the rules meeting it looked like we were going have about six different ships enter into the competition made up of six people per team. So we were off and running all we had to work with was materials that we could scrounge on the ship and although it was not explicitly stated we were pretty much working with only supplies that we could round up on the ship. This is because the next three days involved  at sea days where there would be no access to shore for materials. Even if we were going to go ashore to get materials it would be way too late in order to complete our ship. And the last two days would be spent on excursions at sure leaving only a few hours at night to complete the project.